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Author Question: If an object's acceleration is positive, its speed must be increasing. Indicate whether the ... (Read 84 times)

P68T

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on: Jul 28, 2018
If an object's acceleration is positive, its speed must be increasing.
  Indicate whether the statement is true or false

Question 2

French physicist Hippolyte Fizeau set up an experiment where he sent light through the gaps in the teeth of a rotating gear to a distant mirror, as shown in this figure. He measured the speed of the light when it bounced back from the mirror. If you performed a similar experiment, what value would you get for the speed of light if the distance to the mirror was 50 meters and you estimated that it took light 3  10-7 seconds to travel that distance and return? (See page 349 of your textbook for more on this experiment.)
 a. 6.6  108 meters/second.
  b. 3.3  108 meters/second.
  c. 1.7  108 meters/second.
  d. 3.0  108 meters/second.
  e. 2.997  108 meters/second.


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kusterl

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Reply #1 on: Jul 28, 2018
Answer to Question 1

F
It could have a negative velocity that is getting less negative, which corresponds to a decreasing speed.

Answer to Question 2

b


P68T

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Reply 2 on: Jul 28, 2018
Gracias!

bblaney

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Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

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